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        <h1 id="ES-命令"><a href="#ES-命令" class="headerlink" title="ES 命令"></a>ES 命令</h1><p>delete index</p>
<blockquote>
<p>curl -X DELETE ‘<a href="http://localhost:9200/samples&#39;" target="_blank" rel="noopener">http://localhost:9200/samples&#39;</a></p>
</blockquote>
<p>list all indexes</p>
<blockquote>
<p>curl -X GET ‘<a href="http://localhost:9200/_cat/indices?v&#39;" target="_blank" rel="noopener">http://localhost:9200/_cat/indices?v&#39;</a></p>
</blockquote>
<p>list all docs in index</p>
<blockquote>
<p>curl -X GET ‘<a href="http://localhost:9200/sample/_search&#39;" target="_blank" rel="noopener">http://localhost:9200/sample/_search&#39;</a></p>
</blockquote>
<a id="more"></a>
<p>query using URL parameters</p>
<blockquote>
<p>curl -X GET <a href="http://localhost:9200/samples/_search?q=school:Harvard" target="_blank" rel="noopener">http://localhost:9200/samples/_search?q=school:Harvard</a></p>
</blockquote>
<blockquote>
<p>curl -XGET –header ‘Content-Type: application/json’ <a href="http://localhost:9200/samples/_search" target="_blank" rel="noopener">http://localhost:9200/samples/_search</a> -d ‘{<br>      “query” : {<br>        “match” : { “school”: “Harvard” }<br>    }<br>}’</p>
</blockquote>
<p>list index mapping</p>
<blockquote>
<p>curl -X GET <a href="http://localhost:9200/samples" target="_blank" rel="noopener">http://localhost:9200/samples</a></p>
</blockquote>
<blockquote>
<p><a href="http://10.16.73.100:12801/_mapping/" target="_blank" rel="noopener">http://10.16.73.100:12801/_mapping/</a></p>
</blockquote>
<p>Add Data</p>
<blockquote>
<p>curl -XPUT –header ‘Content-Type: application/json’ <a href="http://localhost:9200/samples/_doc/1" target="_blank" rel="noopener">http://localhost:9200/samples/_doc/1</a> -d ‘{<br>   “school” : “Harvard”<br>}’</p>
</blockquote>
<p>Update Doc</p>
<blockquote>
<p>curl -XPUT –header ‘Content-Type: application/json’ <a href="http://localhost:9200/samples/_doc/2" target="_blank" rel="noopener">http://localhost:9200/samples/_doc/2</a> -d ‘<br>{<br>    “school”: “Clemson”<br>}’</p>
</blockquote>
<blockquote>
<p>curl -XPOST –header ‘Content-Type: application/json’ <a href="http://localhost:9200/samples/_doc/2/_update" target="_blank" rel="noopener">http://localhost:9200/samples/_doc/2/_update</a> -d ‘{<br>“doc” : {<br>               “students”: 50000}<br>}’</p>
</blockquote>
<p>backup index</p>
<blockquote>
<p>curl -XPOST –header ‘Content-Type: application/json’ <a href="http://localhost:9200/_reindex" target="_blank" rel="noopener">http://localhost:9200/_reindex</a> -d ‘{<br>  “source”: {<br>    “index”: “samples”<br>  },<br>  “dest”: {<br>    “index”: “samples_backup”<br>  }<br>}’</p>
</blockquote>
<h1 id="ES-DSL查询"><a href="#ES-DSL查询" class="headerlink" title="ES DSL查询"></a>ES DSL查询</h1><p>query DSL ES中索引的数据都会存储一个_score分值，分值越高就代表越匹配</p>
<p>filter DSL 是或者不是,它不会去计算任何分值，也不会关心返回的排序问题，因此效率会高一点。</p>
<p><img src="http://images2015.cnblogs.com/blog/120296/201603/120296-20160318164439303-146810557.png" alt="查询DSL（query DSL）和过滤DSL（filter DSL"></p>
<h2 id="基本查询demo"><a href="#基本查询demo" class="headerlink" title="基本查询demo"></a>基本查询demo</h2><figure class="highlight json"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line">&#123;</span><br><span class="line">	<span class="attr">"query"</span>: &#123;</span><br><span class="line">		<span class="attr">"bool"</span>: &#123;</span><br><span class="line">			<span class="attr">"must"</span>: [&#123;</span><br><span class="line">				<span class="attr">"term"</span>: &#123;</span><br><span class="line">					<span class="attr">"jz_post-operate_label"</span>: <span class="string">"rpo"</span></span><br><span class="line">				&#125;</span><br><span class="line">			&#125;, &#123;</span><br><span class="line">				<span class="attr">"range"</span>: &#123;</span><br><span class="line">					<span class="attr">"jz_post-id"</span>: &#123;</span><br><span class="line">						<span class="attr">"lt"</span>: <span class="number">5193035</span></span><br><span class="line">					&#125;</span><br><span class="line">				&#125;</span><br><span class="line">			&#125;]</span><br><span class="line">		&#125;</span><br><span class="line">	&#125;,</span><br><span class="line">	<span class="attr">"sort"</span>: [&#123;</span><br><span class="line">			<span class="attr">"jz_post-id"</span>: &#123;</span><br><span class="line">				<span class="attr">"order"</span>: <span class="string">"desc"</span></span><br><span class="line">			&#125;</span><br><span class="line">		&#125;]</span><br><span class="line"></span><br><span class="line">		,</span><br><span class="line">	<span class="attr">"_source"</span>: [</span><br><span class="line">		<span class="string">"jz_post-id"</span></span><br><span class="line">	]</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h2 id="geo-距离查询"><a href="#geo-距离查询" class="headerlink" title="geo 距离查询"></a><a href="http://www.dczou.com/viemall/740.html" target="_blank" rel="noopener">geo 距离查询</a></h2><h3 id="ES-版本实现"><a href="#ES-版本实现" class="headerlink" title="ES 版本实现"></a>ES 版本实现</h3><p>需要将经纬度设置字符串或者数据，对象类型。数据类型设置为geo_point才能查询，底层是<a href="https://en.wikipedia.org/wiki/Geohash" target="_blank" rel="noopener">Geohash</a> 实现</p>
<p>位置过滤：</p>
<ol>
<li>geo_distance 查找距离某个中心点距离在一定范围内的位置</li>
<li>geo_bounding_box 查找某个长方形区域内的位置</li>
<li>geo_distance_range 查找距离某个中心的距离在min和max之间的位置</li>
<li>geo_polygon 查找位于多边形内的地点</li>
</ol>
<figure class="highlight json"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br></pre></td><td class="code"><pre><span class="line">&#123;</span><br><span class="line">  <span class="attr">"query"</span>: &#123;</span><br><span class="line">    <span class="attr">"bool"</span>: &#123;</span><br><span class="line">      <span class="attr">"must_not"</span>: [</span><br><span class="line">        &#123;</span><br><span class="line">          <span class="attr">"terms"</span>: &#123;</span><br><span class="line">            <span class="attr">"jz_post-id"</span>: [</span><br><span class="line">              <span class="number">5433682</span></span><br><span class="line">            ]</span><br><span class="line">          &#125;</span><br><span class="line">        &#125;</span><br><span class="line">      ],</span><br><span class="line">      <span class="attr">"filter"</span>: [</span><br><span class="line">        &#123;</span><br><span class="line">          <span class="attr">"term"</span>: &#123;</span><br><span class="line">            <span class="attr">"jz_post-source"</span>: <span class="number">91</span></span><br><span class="line">          &#125;</span><br><span class="line">        &#125;,</span><br><span class="line">        &#123;</span><br><span class="line">          <span class="attr">"term"</span>: &#123;</span><br><span class="line">            <span class="attr">"jz_post-listing_status"</span>: <span class="number">5</span></span><br><span class="line">          &#125;</span><br><span class="line">        &#125;,</span><br><span class="line">        &#123;</span><br><span class="line">          <span class="attr">"nested"</span>: &#123;</span><br><span class="line">            <span class="attr">"path"</span>: <span class="string">"jz_post_address"</span>,</span><br><span class="line">            <span class="attr">"query"</span>: &#123;</span><br><span class="line">              <span class="attr">"constant_score"</span>: &#123;</span><br><span class="line">                <span class="attr">"filter"</span>: &#123;</span><br><span class="line">                  <span class="attr">"geo_distance"</span>: &#123;</span><br><span class="line">                    <span class="attr">"distance"</span>: <span class="string">"2km"</span>,</span><br><span class="line">                    <span class="attr">"jz_post_address.location"</span>: &#123;</span><br><span class="line">                      <span class="attr">"lat"</span>: <span class="string">"30.26977011"</span>,</span><br><span class="line">                      <span class="attr">"lon"</span>: <span class="string">"120.15865222"</span></span><br><span class="line">                    &#125;</span><br><span class="line">                  &#125;</span><br><span class="line">                &#125;,</span><br><span class="line">                <span class="attr">"boost"</span>: <span class="number">1</span></span><br><span class="line">              &#125;</span><br><span class="line">            &#125;</span><br><span class="line">          &#125;</span><br><span class="line">        &#125;</span><br><span class="line">      ]</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="attr">"sort"</span>: [</span><br><span class="line">    &#123;</span><br><span class="line">      <span class="attr">"_geo_distance"</span>: &#123;</span><br><span class="line">        <span class="attr">"jz_post_address.location"</span>: &#123;</span><br><span class="line">          <span class="attr">"lat"</span>: <span class="string">"30.26977011"</span>,</span><br><span class="line">          <span class="attr">"lon"</span>: <span class="string">"120.15865222"</span></span><br><span class="line">        &#125;,</span><br><span class="line">        <span class="attr">"unit"</span>: <span class="string">"km"</span>,</span><br><span class="line">        <span class="attr">"order"</span>: <span class="string">"asc"</span></span><br><span class="line">      &#125;</span><br><span class="line">    &#125;</span><br><span class="line">  ]</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h3 id="php-mysql实现"><a href="#php-mysql实现" class="headerlink" title="php+mysql实现"></a>php+mysql实现</h3><ol>
<li>计算范围，可以做搜索用户</li>
</ol>
<figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">GetRange</span><span class="params">($lat,$lon,$raidus)</span></span>&#123;</span><br><span class="line">  <span class="comment">//计算纬度</span></span><br><span class="line">  $degree = (<span class="number">24901</span> * <span class="number">1609</span>) / <span class="number">360.0</span>;</span><br><span class="line">  $dpmLat = <span class="number">1</span> / $degree;</span><br><span class="line">  $radiusLat = $dpmLat * $raidus;</span><br><span class="line">  $minLat = $lat - $radiusLat; <span class="comment">//得到最小纬度</span></span><br><span class="line">  $maxLat = $lat + $radiusLat; <span class="comment">//得到最大纬度</span></span><br><span class="line">  <span class="comment">//计算经度</span></span><br><span class="line">  $mpdLng = $degree * cos($lat * (PI / <span class="number">180</span>));</span><br><span class="line">  $dpmLng = <span class="number">1</span> / $mpdLng;</span><br><span class="line">  $radiusLng = $dpmLng * $raidus;</span><br><span class="line">  $minLng = $lon - $radiusLng; <span class="comment">//得到最小经度</span></span><br><span class="line">  $maxLng = $lon + $radiusLng; <span class="comment">//得到最大经度</span></span><br><span class="line">  <span class="comment">//范围</span></span><br><span class="line">  $range = <span class="keyword">array</span>(</span><br><span class="line">    <span class="string">'minLat'</span> =&gt; $minLat,</span><br><span class="line">    <span class="string">'maxLat'</span> =&gt; $maxLat,</span><br><span class="line">    <span class="string">'minLon'</span> =&gt; $minLng,</span><br><span class="line">    <span class="string">'maxLon'</span> =&gt; $maxLng</span><br><span class="line">  );</span><br><span class="line">  <span class="keyword">return</span> $range;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<ol start="2">
<li>获取范围内的所有数据</li>
</ol>
<figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">$result = GetRange(<span class="number">110.325945</span>,<span class="number">20.031541</span>,<span class="number">5000</span>);</span><br><span class="line"> </span><br><span class="line">$where = <span class="string">" (`jingdu` between "</span>.$result[<span class="string">'minLat'</span>].<span class="string">" and "</span>.$result[<span class="string">'maxLat'</span>].<span class="string">") and ( `weidu` between "</span>.$result[<span class="string">'minLon'</span>].<span class="string">" and "</span>.$result[<span class="string">'maxLon'</span>].<span class="string">" ) "</span>;</span><br><span class="line">$query = $db-&gt;query(<span class="string">"select * from distance_table where $where order BY id DESC "</span>);</span><br><span class="line"><span class="keyword">while</span> ( $row = $db-&gt;fetch_array($query) ) &#123;</span><br><span class="line">    $list[] = $row[<span class="string">'all_name'</span>];</span><br><span class="line">&#125;</span><br><span class="line">print_r($list);</span><br></pre></td></tr></table></figure>
<h3 id="PHP计算经纬度坐标之间的距离"><a href="#PHP计算经纬度坐标之间的距离" class="headerlink" title="PHP计算经纬度坐标之间的距离"></a>PHP计算经纬度坐标之间的距离</h3><figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">getDistance</span><span class="params">($lat1, $lng1, $lat2, $lng2, $len_type = <span class="number">1</span>, $decimal = <span class="number">2</span>)</span> </span>&#123;</span><br><span class="line">    $radLat1 = $lat1 * PI / <span class="number">180.0</span>;</span><br><span class="line">    $radLat2 = $lat2 * PI / <span class="number">180.0</span>;</span><br><span class="line">    $a = $radLat1 - $radLat2;</span><br><span class="line">    $b = ($lng1 * PI / <span class="number">180.0</span>) - ($lng2 * PI / <span class="number">180.0</span>);</span><br><span class="line">    $s = <span class="number">2</span> * asin(sqrt(pow(sin($a/<span class="number">2</span>),<span class="number">2</span>) + cos($radLat1) * cos($radLat2) * pow(sin($b/<span class="number">2</span>),<span class="number">2</span>)));</span><br><span class="line">    $s = $s * EARTH_RADIUS;</span><br><span class="line">    $s = round($s * <span class="number">1000</span>);</span><br><span class="line">    <span class="keyword">if</span> ($len_type &gt; <span class="number">1</span>)</span><br><span class="line">    &#123;</span><br><span class="line">    $s /= <span class="number">1000</span>;</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="keyword">return</span> round($s, $decimal);</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h2 id="精确匹配查询-match-phrase"><a href="#精确匹配查询-match-phrase" class="headerlink" title="精确匹配查询(match_phrase)"></a>精确匹配查询(match_phrase)</h2><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br></pre></td><td class="code"><pre><span class="line">&#123;</span><br><span class="line">  &quot;query&quot;: &#123;</span><br><span class="line">    &quot;constant_score&quot;: &#123;</span><br><span class="line">      &quot;filter&quot;: &#123;</span><br><span class="line">        &quot;bool&quot;: &#123;</span><br><span class="line">          &quot;must&quot;: [</span><br><span class="line">            &#123;</span><br><span class="line">              &quot;term&quot;: &#123;</span><br><span class="line">                &quot;jz_post-city_id&quot;: 289</span><br><span class="line">              &#125;</span><br><span class="line">            &#125;,</span><br><span class="line">            &#123;</span><br><span class="line">              &quot;term&quot;: &#123;</span><br><span class="line">                &quot;jz_post-job_date_type&quot;: 0</span><br><span class="line">              &#125;</span><br><span class="line">            &#125;,</span><br><span class="line">            &#123;</span><br><span class="line">              &quot;term&quot;: &#123;</span><br><span class="line">                &quot;jz_post-company_id&quot;: 1836671</span><br><span class="line">              &#125;</span><br><span class="line">            &#125;,</span><br><span class="line">            &#123;</span><br><span class="line">              &quot;terms&quot;: &#123;</span><br><span class="line">                &quot;jz_post-listing_status&quot;: [</span><br><span class="line">                  0,</span><br><span class="line">                  5</span><br><span class="line">                ]</span><br><span class="line">              &#125;</span><br><span class="line">            &#125;</span><br><span class="line">          ],</span><br><span class="line">          &quot;should&quot;: [</span><br><span class="line">            &#123;</span><br><span class="line">              &quot;match_phrase&quot;: &#123;</span><br><span class="line">                &quot;jz_post-title&quot;: &quot;诚心招聘业务员&quot;</span><br><span class="line">              &#125;</span><br><span class="line">            &#125;</span><br><span class="line">          ]</span><br><span class="line">        &#125;</span><br><span class="line">      &#125;</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h2 id="短语前缀匹配"><a href="#短语前缀匹配" class="headerlink" title="短语前缀匹配"></a>短语前缀匹配</h2><p>它与短语匹配的区别为它能匹配的方位更广，它可以命中到短语+其他内容的内容</p>
<figure class="highlight json"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">&#123;</span><br><span class="line">  <span class="attr">"query"</span>: &#123;</span><br><span class="line">    <span class="attr">"match_phrase_prefix"</span>: &#123;</span><br><span class="line">      <span class="attr">"FIELD"</span>: <span class="string">"PREFIX"</span></span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h1 id="ES文档参考"><a href="#ES文档参考" class="headerlink" title="ES文档参考"></a>ES文档参考</h1><ul>
<li><a href="http://moliware.com/es-dsl-cheatsheet/" target="_blank" rel="noopener">es-dsl-cheatsheet</a></li>
<li><a href="https://blog.csdn.net/g1969119894/article/details/80111067#%E6%9F%A5%E8%AF%A2" target="_blank" rel="noopener">DSL语法查询文档</a></li>
<li><a href="https://www.elastic.co/guide/en/elasticsearch/reference/5.5/query-filter-context.html" target="_blank" rel="noopener">ES5.6文档</a></li>
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              <div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-1"><a class="nav-link" href="#ES-命令"><span class="nav-number">1.</span> <span class="nav-text">ES 命令</span></a></li><li class="nav-item nav-level-1"><a class="nav-link" href="#ES-DSL查询"><span class="nav-number">2.</span> <span class="nav-text">ES DSL查询</span></a><ol class="nav-child"><li class="nav-item nav-level-2"><a class="nav-link" href="#基本查询demo"><span class="nav-number">2.1.</span> <span class="nav-text">基本查询demo</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#geo-距离查询"><span class="nav-number">2.2.</span> <span class="nav-text">geo 距离查询</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#ES-版本实现"><span class="nav-number">2.2.1.</span> <span class="nav-text">ES 版本实现</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#php-mysql实现"><span class="nav-number">2.2.2.</span> <span class="nav-text">php+mysql实现</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#PHP计算经纬度坐标之间的距离"><span class="nav-number">2.2.3.</span> <span class="nav-text">PHP计算经纬度坐标之间的距离</span></a></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#精确匹配查询-match-phrase"><span class="nav-number">2.3.</span> <span class="nav-text">精确匹配查询(match_phrase)</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#短语前缀匹配"><span class="nav-number">2.4.</span> <span class="nav-text">短语前缀匹配</span></a></li></ol></li><li class="nav-item nav-level-1"><a class="nav-link" href="#ES文档参考"><span class="nav-number">3.</span> <span class="nav-text">ES文档参考</span></a></li></ol></div>
            

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  <script type="text/javascript">
    // Popup Window;
    var isfetched = false;
    var isXml = true;
    // Search DB path;
    var search_path = "search.xml";
    if (search_path.length === 0) {
      search_path = "search.xml";
    } else if (/json$/i.test(search_path)) {
      isXml = false;
    }
    var path = "/" + search_path;
    // monitor main search box;

    var onPopupClose = function (e) {
      $('.popup').hide();
      $('#local-search-input').val('');
      $('.search-result-list').remove();
      $('#no-result').remove();
      $(".local-search-pop-overlay").remove();
      $('body').css('overflow', '');
    }

    function proceedsearch() {
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay"></div>')
        .css('overflow', 'hidden');
      $('.search-popup-overlay').click(onPopupClose);
      $('.popup').toggle();
      var $localSearchInput = $('#local-search-input');
      $localSearchInput.attr("autocapitalize", "none");
      $localSearchInput.attr("autocorrect", "off");
      $localSearchInput.focus();
    }

    // search function;
    var searchFunc = function(path, search_id, content_id) {
      'use strict';

      // start loading animation
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay">' +
          '<div id="search-loading-icon">' +
          '<i class="fa fa-spinner fa-pulse fa-5x fa-fw"></i>' +
          '</div>' +
          '</div>')
        .css('overflow', 'hidden');
      $("#search-loading-icon").css('margin', '20% auto 0 auto').css('text-align', 'center');

      $.ajax({
        url: path,
        dataType: isXml ? "xml" : "json",
        async: true,
        success: function(res) {
          // get the contents from search data
          isfetched = true;
          $('.popup').detach().appendTo('.header-inner');
          var datas = isXml ? $("entry", res).map(function() {
            return {
              title: $("title", this).text(),
              content: $("content",this).text(),
              url: $("url" , this).text()
            };
          }).get() : res;
          var input = document.getElementById(search_id);
          var resultContent = document.getElementById(content_id);
          var inputEventFunction = function() {
            var searchText = input.value.trim().toLowerCase();
            var keywords = searchText.split(/[\s\-]+/);
            if (keywords.length > 1) {
              keywords.push(searchText);
            }
            var resultItems = [];
            if (searchText.length > 0) {
              // perform local searching
              datas.forEach(function(data) {
                var isMatch = false;
                var hitCount = 0;
                var searchTextCount = 0;
                var title = data.title.trim();
                var titleInLowerCase = title.toLowerCase();
                var content = data.content.trim().replace(/<[^>]+>/g,"");
                var contentInLowerCase = content.toLowerCase();
                var articleUrl = decodeURIComponent(data.url);
                var indexOfTitle = [];
                var indexOfContent = [];
                // only match articles with not empty titles
                if(title != '') {
                  keywords.forEach(function(keyword) {
                    function getIndexByWord(word, text, caseSensitive) {
                      var wordLen = word.length;
                      if (wordLen === 0) {
                        return [];
                      }
                      var startPosition = 0, position = [], index = [];
                      if (!caseSensitive) {
                        text = text.toLowerCase();
                        word = word.toLowerCase();
                      }
                      while ((position = text.indexOf(word, startPosition)) > -1) {
                        index.push({position: position, word: word});
                        startPosition = position + wordLen;
                      }
                      return index;
                    }

                    indexOfTitle = indexOfTitle.concat(getIndexByWord(keyword, titleInLowerCase, false));
                    indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false));
                  });
                  if (indexOfTitle.length > 0 || indexOfContent.length > 0) {
                    isMatch = true;
                    hitCount = indexOfTitle.length + indexOfContent.length;
                  }
                }

                // show search results

                if (isMatch) {
                  // sort index by position of keyword

                  [indexOfTitle, indexOfContent].forEach(function (index) {
                    index.sort(function (itemLeft, itemRight) {
                      if (itemRight.position !== itemLeft.position) {
                        return itemRight.position - itemLeft.position;
                      } else {
                        return itemLeft.word.length - itemRight.word.length;
                      }
                    });
                  });

                  // merge hits into slices

                  function mergeIntoSlice(text, start, end, index) {
                    var item = index[index.length - 1];
                    var position = item.position;
                    var word = item.word;
                    var hits = [];
                    var searchTextCountInSlice = 0;
                    while (position + word.length <= end && index.length != 0) {
                      if (word === searchText) {
                        searchTextCountInSlice++;
                      }
                      hits.push({position: position, length: word.length});
                      var wordEnd = position + word.length;

                      // move to next position of hit

                      index.pop();
                      while (index.length != 0) {
                        item = index[index.length - 1];
                        position = item.position;
                        word = item.word;
                        if (wordEnd > position) {
                          index.pop();
                        } else {
                          break;
                        }
                      }
                    }
                    searchTextCount += searchTextCountInSlice;
                    return {
                      hits: hits,
                      start: start,
                      end: end,
                      searchTextCount: searchTextCountInSlice
                    };
                  }

                  var slicesOfTitle = [];
                  if (indexOfTitle.length != 0) {
                    slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle));
                  }

                  var slicesOfContent = [];
                  while (indexOfContent.length != 0) {
                    var item = indexOfContent[indexOfContent.length - 1];
                    var position = item.position;
                    var word = item.word;
                    // cut out 100 characters
                    var start = position - 20;
                    var end = position + 80;
                    if(start < 0){
                      start = 0;
                    }
                    if (end < position + word.length) {
                      end = position + word.length;
                    }
                    if(end > content.length){
                      end = content.length;
                    }
                    slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
                  }

                  // sort slices in content by search text's count and hits' count

                  slicesOfContent.sort(function (sliceLeft, sliceRight) {
                    if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
                      return sliceRight.searchTextCount - sliceLeft.searchTextCount;
                    } else if (sliceLeft.hits.length !== sliceRight.hits.length) {
                      return sliceRight.hits.length - sliceLeft.hits.length;
                    } else {
                      return sliceLeft.start - sliceRight.start;
                    }
                  });

                  // select top N slices in content

                  var upperBound = parseInt('1');
                  if (upperBound >= 0) {
                    slicesOfContent = slicesOfContent.slice(0, upperBound);
                  }

                  // highlight title and content

                  function highlightKeyword(text, slice) {
                    var result = '';
                    var prevEnd = slice.start;
                    slice.hits.forEach(function (hit) {
                      result += text.substring(prevEnd, hit.position);
                      var end = hit.position + hit.length;
                      result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
                      prevEnd = end;
                    });
                    result += text.substring(prevEnd, slice.end);
                    return result;
                  }

                  var resultItem = '';

                  if (slicesOfTitle.length != 0) {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
                  } else {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
                  }

                  slicesOfContent.forEach(function (slice) {
                    resultItem += "<a href='" + articleUrl + "'>" +
                      "<p class=\"search-result\">" + highlightKeyword(content, slice) +
                      "...</p>" + "</a>";
                  });

                  resultItem += "</li>";
                  resultItems.push({
                    item: resultItem,
                    searchTextCount: searchTextCount,
                    hitCount: hitCount,
                    id: resultItems.length
                  });
                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
  </script>





  

  

  

  
  

  

  

  

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</html>
